Vat dyeing method
A technology for dyeing and dyeing yarn, which is applied in the field of yarn dyeing with vat dyes, which can solve the problems of easy to produce color spots, cumbersome operation, yarn color spots, etc., and achieve the effect of bright color, uniform color and uniform color development
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Embodiment 1
[0042] This embodiment is a method for dyeing yarn with vat dyes. In a dyeing vat with a diameter of 1800MM, a cylinder of 50S pure cotton cheese is cast and dyed. The cheese is a regular cylinder, and the density of the cheese in the same cylinder is basically the same. 0.37g / cm 3 , The bath ratio is 1:7.3, and the vat dye formula is: Shihlin Brilliant Green 0.0095% OWF, Shihlin Blue 0.326% OWF.
[0043] Proceed as follows:
[0044] 1. Pretreatment: After the bobbin is put into the vat, the main vat is filled with water, adding 0.9g / L scouring agent, 0.8g / L chelating dispersant, 0.8g / L hydrogen peroxide stabilizer, 3.0g / L 50% liquid caustic soda, 27.5 %H 2 o 2 4.5g / L, heat up to 110°C for 30 minutes; drain, then add water, add HAC 0.8g / L for pickling, and treat at room temperature for 5 minutes; drain, then add water, add 0.15g / L enzyme water to deoxygenate, and treat at room temperature for 5 minutes; drained, to be dyed;
[0045] 2. Dyeing—reduction: after the pretreat...
Embodiment 2
[0050] This embodiment is a method for dyeing yarn with vat dyes. In a dyeing vat with a diameter of 1400MM, a vat of 40S pure cotton warp beam is cast and dyed, and the shaft surface is smooth, the yarn weight is 213.15KG, and the axial density is 0.47g / cm 3 , The bath ratio is 1:11.59, and the vat dye formula is: Shihlin Blue 0.0036% OWF, Shihlin Olive Green 0.205% OWF, Shihlin Purple 0.073% OWF.
[0051] Proceed as follows:
[0052] 1. Pre-treatment: After the warp yarn is put into the vat, the main vat is filled with water, adding 0.9g / L scouring agent, 0.8g / L chelating dispersant, 0.8g / L hydrogen peroxide stabilizer, 3.0g / L 50% liquid caustic soda, 27.5%H 2 o 2 4.5g / L, heat up to 110°C for 30 minutes; drain, then add water, add HAC 0.8g / L for pickling, and treat at room temperature for 5 minutes; drain, then add water, add 0.15g / L enzyme water to deoxygenate, and treat at room temperature for 5 minutes; drained, to be dyed;
[0053] 2. Dyeing——reduction: after the pre...
Embodiment 3
[0058] A kind of vat dye yarn dyeing method of present embodiment, its raw material and steps are the same as embodiment 1, difference is:
[0059] Step 2 Dyeing——In reduction, adjust the pump speed to 1160 rpm;
[0060] Step 3 Dyeing - during oxidation, reduce the pump speed to 580 rpm;
[0061] In step 4 aftertreatment, adjust the pump speed to 1450 rpm.
[0062] The inner and outer color difference of the package yarn dyed by the above method: Delta E 0.49, colorless, no package. There is no feedback on the quality of internal and external differences in subsequent processing and use procedures; in terms of color fastness: light fastness, water fastness, perspiration fastness, washing fastness, and chlorine bleaching fastness all reach 4-5 grades (ISO, 5 grades) rating method).
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